Signal automatic detection switching device and method applied to video terminal

The invention discloses a signal automatic detection switching device and method applied to a video terminal, and relates to the technical field of signal switching. The device comprises a main shell unit and a processing unit. The device has the beneficial effects that from the perspective of system maintenance, the device can effectively reduce the overhaul range after a fault occurs in a video conference system, the fault rate of the system is effectively reduced, after the fault occurs, the device can detect and switch a signal source at the first time, the influence on the conference can be reduced to the minimum, and the system reliability is improved. The experience of participants is improved, a device for switching main and standby signals in the market still stays in a single mode for switching a certain signal, the problems of network and video signal detection and automatic switching in a conference system can be solved at the same time through the device, and the device is more convenient and pra